Dust generated on underground mechanized coal mining faces is a health and safety hazard. Continuous miners deployed underground usually have an integrated flooded-bed dust scrubber mounted onto the machine that arrests the generated dust from close to the face and cleanses the air around it. However, the impingement screen might get clogged depending on the coal seam being worked. This necessitates the cleaning of the screen which in turn, reduces the overall availability of the scrubber and, hence the continuous miner. A novel non-clogging screen has been developed at the Department of Mining Engineering, University of Kentucky. The proposed impingement screen is built up of three individual aluminum screen units 1.5 mm thick and separated by 3 and 2 mm respectively. The screens have long vertical slits measuring 6 mm. A water spray continuously keeps the screen wet and provides for the filter element to arrest the dust particles. The slits force the dust-laden air to make sharp turns. The dust particles cannot change directions rapidly, impact one of the three screens and are separated out based on their momentum. Preliminary computational fluid dynamics (CFD) models have indicated significant cleaning efficiencies in the respirable range at the expense of much lower pressure drops. Results indicated by CFD models and supported by laboratory experiments have been discussed in this paper.
|State||Published - 2018|
|Event||2018 SME Annual Conference and Expo and 91st Annual Meeting of the SME-MN Section - Vision, Innovation and Identity: Step Change for a Sustainable Future - Minneapolis, United States|
Duration: Feb 25 2018 → Feb 28 2018
|Conference||2018 SME Annual Conference and Expo and 91st Annual Meeting of the SME-MN Section - Vision, Innovation and Identity: Step Change for a Sustainable Future|
|Period||2/25/18 → 2/28/18|
Bibliographical noteFunding Information:
The authors acknowledge the National Institute for Occupational Safety and Health (NIOSH) for funding this research. Dr. Thomas Novak, Professor of Mining Engineering, is also acknowledged for his continued support and encouragement.
© 2018 Society for Mining Metallurgy and Exploration (SME). All rights reserved.
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology